Help with isolation for Linn LP12 on wood floor

Hi,

Thanks again to all members with their help with my previous hum issue. Now this system "Tubes that rock" is almost there! I moved the Turntable from the right side to the left side of the wall unit and it seems to be more acceptable to vibration and skips when someone walks by. I am not getting feedback while playing but I think it would sound better with some type of isolation device or isolation shelf etc. Unfortunately I know nothing about them. Suggestions would be appreciated. Thanks to all for your invaluable help